#include <string>  #include <vector>      inline BYTE toHex(const BYTE x)  {      return x>9?x+55:x+48;  }      std::string WC2UT(const wchar_t* buf)  {      int len=WideCharToMultiByte(CP_UTF8,0,buf,-1,NULL,0,NULL,NULL);      std::vector<char> utf8(len);      WideCharToMultiByte(CP_UTF8,0,buf,-1,&utf8[0],len,NULL,NULL);      return std::string(&utf8[0]);  }      std::wstring MB2WC(const char* buf)  {      int len=MultiByteToWideChar(CP_ACP,0,buf,-1,NULL,0);      std::vector<wchar_t> unicode(len);      MultiByteToWideChar(CP_ACP,0,buf,-1,&unicode[0],len);      return std::wstring(&unicode[0]);  }      //参数要用指针。  void URLEncode(CString* str)  {      std::string sln=str->GetBuffer(0);      sln=WC2UT(MB2WC(sln.c_str()).c_str());      std::string sOut;      for (size_t ix=0;ix<sln.size();ix++)      {          BYTE buf[4];          memset(buf,0,4);          if (isalnum((BYTE)sln[ix]))              buf[0]=sln[ix];          else if (isspace((BYTE)sln[ix]))              buf[0]='+';          else          {              buf[0]='%';              buf[1]=toHex((BYTE)sln[ix]>>4);              buf[2]=toHex((BYTE)sln[ix]);          }          sOut+=(char*)buf;      }      CString out=sOut.c_str();      *str=out;  }